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Use ranges in bus@c0000000 to indicate address translation, as the bus fabric trims CPU address 0xc000_0000..0xdfff_ffff to 0x0000_0000..0x1fff_ffff. Set 'config' and 'addr_space' reg values to 0. Change parent bus address of downstream I/O and non-prefetchable memory to 0. Ensure no functional impact on the final address translation result. Prepare for the removal of the driver=E2=80=99s cpu_addr_fixup(). Signed-off-by: Frank Li --- arch/arm/boot/dts/axis/artpec6.dtsi | 92 ++++++++++++++++++++-------------= ---- 1 file changed, 50 insertions(+), 42 deletions(-) diff --git a/arch/arm/boot/dts/axis/artpec6.dtsi b/arch/arm/boot/dts/axis/a= rtpec6.dtsi index 037157e6c5ee3..399e87f72865f 100644 --- a/arch/arm/boot/dts/axis/artpec6.dtsi +++ b/arch/arm/boot/dts/axis/artpec6.dtsi @@ -155,49 +155,57 @@ pmu { interrupt-affinity =3D <&cpu0>, <&cpu1>; }; =20 - /* - * Both pci nodes cannot be enabled at the same time, - * leave the unwanted node as disabled. - */ - pcie: pcie@f8050000 { - compatible =3D "axis,artpec6-pcie", "snps,dw-pcie"; - reg =3D <0xf8050000 0x2000 - 0xf8040000 0x1000 - 0xc0000000 0x2000>; - reg-names =3D "dbi", "phy", "config"; - #address-cells =3D <3>; - #size-cells =3D <2>; - device_type =3D "pci"; - /* downstream I/O */ - ranges =3D <0x81000000 0 0 0xc0002000 0 0x00010000 - /* non-prefetchable memory */ - 0x82000000 0 0xc0012000 0xc0012000 0 0x1ffee000>; - num-lanes =3D <2>; - bus-range =3D <0x00 0xff>; - interrupts =3D ; - interrupt-names =3D "msi"; - #interrupt-cells =3D <1>; - interrupt-map-mask =3D <0 0 0 0x7>; - interrupt-map =3D <0 0 0 1 &intc GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>, - <0 0 0 2 &intc GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>, - <0 0 0 3 &intc GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>, - <0 0 0 4 &intc GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>; - axis,syscon-pcie =3D <&syscon>; - status =3D "disabled"; - }; + bus@c0000000 { + compatible =3D "simple-bus"; + ranges =3D <0x0 0xc0000000 0x20000000>, + <0xf8000000 0xf8000000 0x80000>; + #address-cells =3D <1>; + #size-cells =3D <1>; =20 - pcie_ep: pcie_ep@f8050000 { - compatible =3D "axis,artpec6-pcie-ep", "snps,dw-pcie"; - reg =3D <0xf8050000 0x2000 - 0xf8051000 0x2000 - 0xf8040000 0x1000 - 0xc0000000 0x20000000>; - reg-names =3D "dbi", "dbi2", "phy", "addr_space"; - num-ib-windows =3D <6>; - num-ob-windows =3D <2>; - num-lanes =3D <2>; - axis,syscon-pcie =3D <&syscon>; - status =3D "disabled"; + /* + * Both pci nodes cannot be enabled at the same time, + * leave the unwanted node as disabled. + */ + pcie: pcie@f8050000 { + compatible =3D "axis,artpec6-pcie", "snps,dw-pcie"; + reg =3D <0xf8050000 0x2000 + 0xf8040000 0x1000 + 0x00000000 0x2000>; + reg-names =3D "dbi", "phy", "config"; + #address-cells =3D <3>; + #size-cells =3D <2>; + device_type =3D "pci"; + /* downstream I/O */ + ranges =3D <0x81000000 0 0 0x00002000 0 0x00010000 + /* non-prefetchable memory */ + 0x82000000 0 0xc0012000 0x00012000 0 0x1ffee000>; + num-lanes =3D <2>; + bus-range =3D <0x00 0xff>; + interrupts =3D ; + interrupt-names =3D "msi"; + #interrupt-cells =3D <1>; + interrupt-map-mask =3D <0 0 0 0x7>; + interrupt-map =3D <0 0 0 1 &intc GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 2 &intc GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 3 &intc GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 4 &intc GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>; + axis,syscon-pcie =3D <&syscon>; + status =3D "disabled"; + }; + + pcie_ep: pcie_ep@f8050000 { + compatible =3D "axis,artpec6-pcie-ep", "snps,dw-pcie"; + reg =3D <0xf8050000 0x2000 + 0xf8051000 0x2000 + 0xf8040000 0x1000 + 0x00000000 0x20000000>; + reg-names =3D "dbi", "dbi2", "phy", "addr_space"; 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Set use_parent_dt_ranges to allow the DWC core driver = to fetch address translation from the device tree. Signed-off-by: Frank Li --- drivers/pci/controller/dwc/pcie-artpec6.c | 20 ++------------------ 1 file changed, 2 insertions(+), 18 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/contro= ller/dwc/pcie-artpec6.c index 234c8cbcae3af..d2a628a0fdc17 100644 --- a/drivers/pci/controller/dwc/pcie-artpec6.c +++ b/drivers/pci/controller/dwc/pcie-artpec6.c @@ -94,23 +94,6 @@ static void artpec6_pcie_writel(struct artpec6_pcie *art= pec6_pcie, u32 offset, u regmap_write(artpec6_pcie->regmap, offset, val); } =20 -static u64 artpec6_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 cpu_addr) -{ - struct artpec6_pcie *artpec6_pcie =3D to_artpec6_pcie(pci); - struct dw_pcie_rp *pp =3D &pci->pp; - struct dw_pcie_ep *ep =3D &pci->ep; - - switch (artpec6_pcie->mode) { - case DW_PCIE_RC_TYPE: - return cpu_addr - pp->cfg0_base; - case DW_PCIE_EP_TYPE: - return cpu_addr - ep->phys_base; - default: - dev_err(pci->dev, "UNKNOWN device type\n"); - } - return cpu_addr; -} - static int artpec6_pcie_establish_link(struct dw_pcie *pci) { struct artpec6_pcie *artpec6_pcie =3D to_artpec6_pcie(pci); @@ -134,7 +117,6 @@ static void artpec6_pcie_stop_link(struct dw_pcie *pci) } =20 static const struct dw_pcie_ops dw_pcie_ops =3D { - .cpu_addr_fixup =3D artpec6_pcie_cpu_addr_fixup, .start_link =3D artpec6_pcie_establish_link, .stop_link =3D artpec6_pcie_stop_link, }; @@ -433,6 +415,8 @@ static int artpec6_pcie_probe(struct platform_device *p= dev) =20 platform_set_drvdata(pdev, artpec6_pcie); =20 + pci->use_parent_dt_ranges =3D true; + switch (artpec6_pcie->mode) { case DW_PCIE_RC_TYPE: if (!IS_ENABLED(CONFIG_PCIE_ARTPEC6_HOST)) --=20 2.34.1